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T0 ALL WHOM IT MAY CONCERN:

Be it known thatI, D. P.'N1cKERs0N, of Cleveland, in the county of Cuyahoga,V and Stateof Ohio, have invented certain new and useful Improvements in Windlasses; and I do hereby declare that the followingis a full and complete description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a side view of the windlass.

v Figure 2 is a view of thetop.

Figure 3 is an end view.

Like letters of reference refer to like parts in the views. 1

A, iig. 1, is a frame, in which is arranged the following machinery, viz: B is a. shaft, on the upper end of which is keyed a crown-wheel, C, and immediately below it a bevelled wheel, D. E is also a shaft, having its bearings in the post F and standard G, upon which are loosely fitted bevelled wheels H I, which are made to slide upon .the shaft, but prevented from turning upon the same by being feathered. These two wheels are so disposed on the shaft that the wheel I is made to engage in the wheel D, and the wheel H to engage in the crownwheel C. The purpose of these wheels will hereafter be shown. On the end of the shaft E, which is seen to project through the post F,.is keyed a small bevelled wheel J, fig. 3. This wheel engages with another of a like character, J, keyed to the vertical shaft K,.upon the lower en'd of which is cut a worm, L. M, iig. 3, is a windlass, on the centre of which is placed and fixed a toothed wheel, N, which' will be seen to engage in the worm L, and by which the windlass is turned, as will presently be shown. P P', g. 1, are a pair of levers, the lower ends of which are pivoted to the post F, whereas theupper ends project through the top of the frame and are held in place by a guide-stay, Q, iig. 2. To the levenP is pivoted alink, R, the end of which is bifurcated, and so bent as to fit in a groove cut around the sleeve S of the bevelledwheel I, and by which the said wheel is moved into and out of gear with the wheel I, by the use of the lever referred to. The wheel H is also thrown into and out of engagement vwith the crown-wheel in the same way by a link operated by the lever P. The bifurcated ends of the links alluded to are shown at a, iig. 1.

The practical use of'this apparatus is for raising and lowering heavy weights on board of vessels or other places when great power is required for raising heavy bodies, and which may be used in connection with a swing-crane or a run of sheaves, as the nature of the circumstances may render it expedient or the most con venient. The application of the windlass is as follows: The rope or chain to which the body to'be raised is connected is attached to the windlass, around which it is wound, and lin order to raise it the bevel-wheels I D aremade to engage by means of the lever P and link R. Then on turning the capstan T, to the spindle or shaft of which the wheel D is keyed the worm L'is made to turn, which, being engaged in the toothed wheel N, causes the windlass to turn and thus wind up the rope or chains, thereby drawing up the weight, and lowering the same by reversing 'the action of the capstan. Should the weight to be raised be small or light, and hence require but little power to move it, but much speed, the crown-wheel is made to engage in the wheel H, and thus the revolution of the worm and windlass ialargely increased, thereby lifting and lowering the body with greater speed l'than a heavier body could be moved as above instanced.

The advantages of the employment of this windlass for the purpose specified are that its action is sure and safe, combined with great power, requiring but one person to operate it. In the ordinary windlass any sudden or violent movement will be likely to canse the gearing and pawls to slip, and the apparatus to run with great speed and danger to those working it; but in this windlass the ascent or descent of the weight can be arrested at any point by simply ceasing to turn the capstan, as the construction of the apparatus is such that it will not turn unless made to do so by turning the capstan, thus giving to the machine greater safety and convenience, and unaffected by any sudden and violent disturbance.

What I claim as myimprovement, and desire to secure by Letters Patent, is

l. The crown-wheel C, wheels I-I J, and lever or shifter P', in combination with the wheel J', worm L, and windlass M, as and for the purpose substantially as set forth.

2. The wheels D I, shifter P', and wheel J, as arranged in combination with the wheel J, worm L, and n'indlass M, for the purpose and in the manner as herein described.

3. The herein-described windlass when arranged so that by shifting the gearing in the manner as above set forth, the power of the windlass is thereby increased; also by reversing the above relation of said gearing, the power will be decreased but the speed augmented, thereby adapting the action of the windlass to movingheavy or light bodies, substantially as specified.

D. P. NICKERSON.

L Witnesses:v

" J. H. BURRIDGE,

FRANK ALBEN. 

